SEARCH Articles Figures Tables Fischer, G., Tropones, Tropolones, and Tropylium Salts with Fused Heterocyclic Pyrrolo tropylium salts Thieno tropylium salts Triphenylcarbenium, tropylium, and other carbenium salts Tropylium Tropylium salts annelated Tropylium salts with fused hetercyclic rings structure, reactivity, and application Tropylium salts with fused heterocyclic rings Tropylium salts with fused heterocyclic rings synthesis